medium or long cage mech needed?

sofaboy73
sofaboy73 Posts: 574
edited July 2014 in MTB buying advice
need a new rear mech as large rock has killed the last one. looking at one of these

http://www.chainreactioncycles.com/shim ... -prod83162

currently running 2x10 set up (38 / 24 and 11 / 36), could i get away with a medium cage or is it another long needed?

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